MAGNETIC ACTIVITY AND ORBITAL PERIOD VARIATION OF THE SHORT-PERIOD ECLIPSING BINARY DV Psc
文献类型：期刊论文
| 作者 | Pi, QF1,2; Zhang, LY1,2 ; Li, ZM3; Zhang XL(张西亮)2,4
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| 刊名 | ASTRONOMICAL JOURNAL
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| 出版日期 | 2014-03 |
| 卷号 | 147期号:3 |
| 关键词 | binaries: eclipsing stars: chromospheres stars: flare stars: late-type starspots |
| ISSN号 | 0004-6256 |
| 产权排序 | 第四完成单位 |
| 通讯作者 | Zhang, LY (reprint author), Guizhou Univ, Coll Sci, Dept Phys, Guiyang 550025, Peoples R China. |
| 英文摘要 | We present six new BVRcIc CCD light curves of a short-period RS CVn binary DV Psc obtained in 2010-2012. The light curve distortions change on both short and long timescales, which is explained by two starspots on the primary component. Moreover, five new flare events were detected and the flare ratio of DV Psc is about 0.082 flares per hour. There is a possible relation between the phases (longitude) of the flares and starspots for all of the available data of late-type binaries, which implies a correlation of the stellar activity of the spots and flares. The cyclic oscillation, with a period of 4.9 +/- 0.4 yr, may result from the magnetic activity cycle, identified by the variability of Max. I-Max. II. Until now, there were no spectroscopic studies of chromospheric activity indicators of the H-beta and H-gamma lines for DV Psc. Our observations of these indicators show that DV Psc is active, with excess emissions. The updated O - C diagram with an observing time span of about 15 yr shows an upward parabola, which indicates a secular increase in the orbital period of DV Psc. The orbital period secularly increases at a rate of dP/dt = 2.0x10(-7) days yr(-1), which might be explained by the angular momentum exchanges or mass transfer from the secondary to primary component. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | RS-CANUM-VENATICORUM ; CHROMOSPHERIC ACTIVITY ; CLOSE BINARIES ; RT ANDROMEDAE ; II-PEGASI ; H-ALPHA ; STAR ; EMISSION ; MODULATION ; SYSTEMS |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.1088/0004-6256/147/3/50/meta |
| 语种 | 英语 |
| WOS记录号 | WOS:000331125600005 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5448]  |
| 专题 | 云南天文台_丽江天文观测站（南方基地） 云南天文台_中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.College of Science/Department of Physics & NAOC-GZU-Sponsored Center for Astronomy Research, Guizhou University, Guiyang 550025, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China 3.Institute for Astronomy and History of Science and Technology, Dali University, Dali 671003, China 4.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China |
| 推荐引用方式 GB/T 7714 | Pi, QF,Zhang, LY,Li, ZM,et al. MAGNETIC ACTIVITY AND ORBITAL PERIOD VARIATION OF THE SHORT-PERIOD ECLIPSING BINARY DV Psc[J]. ASTRONOMICAL JOURNAL,2014,147(3). |
| APA | Pi, QF,Zhang, LY,Li, ZM,&Zhang XL.(2014).MAGNETIC ACTIVITY AND ORBITAL PERIOD VARIATION OF THE SHORT-PERIOD ECLIPSING BINARY DV Psc.ASTRONOMICAL JOURNAL,147(3). |
| MLA | Pi, QF,et al."MAGNETIC ACTIVITY AND ORBITAL PERIOD VARIATION OF THE SHORT-PERIOD ECLIPSING BINARY DV Psc".ASTRONOMICAL JOURNAL 147.3(2014). |
入库方式： OAI收割
来源：云南天文台
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